[Haskell-beginners] Issue installing reactive-banana-5.0.0.1

[Miguel Negrao]

Hi

It appears I can’t install reactive-banana-5.0.0.1:

cabal install reactive-banana
Resolving dependencies...
cabal: cannot configure mtl-2.1. It requires transformers ==0.3.*
For the dependency on transformers ==0.3.* there are these packages:
transformers-0.3.0.0. However none of them are available.
transformers-0.3.0.0 was excluded because reactive-banana-0.5.0.1 requires
transformers ==0.2.*

How can I solve this ?

thank you,
Miguel